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VL36 Series Lift Check Valves
The selection of a valve for any application or system design must be considered to ensure safe performance.
All dimensions shown are for reference only and subject to change. Dimensions with DK-LOK are in finger-tight position.
We reserve the right to change specification stated in this catalog for our continuing program of product improvemenr.
Valve function, valve rating, material compatibility, proper installation, operation and maintenance remain the sole respons-
ibillty of the system designer and the user. Dk Tech accepts no liability for any improper selection, installation, operation or
maintenance.
Safe Valve Selection
Spring
Prefix "9SPR" and select an applicable valve series and the
designator of the spring nominal cracking pressure.
9SPR-(Valve series)-(spring designator)-2
Example: 9SPR-V33A-1/3-2
How to order VH36 Series spring kit.
VH36 spring kit contains a spring and an indicator ring.
Select an applicable valve series and the designator of the
spring nominal cracking pressure.
(Valve series)-RINGSPR-(spring designator)-SA
Example:VH36A-RINGSPR-5-SA
O-ring
Prefix "9ORG", select an applicable valve series and seal material
designator.
Example: 9ORG-V33A-BN
How to order VH36 Series seal kit.
VH36 seal kit contains (Refer to VH36 Materials of Construction)
#4. Poppet with bonded seal, #7. O-ring and #8. Backup ring.
Select an applicable valve series and seal material designator
SK-(valve series)-(seal material designator)
Examples: SK-VH36A-VT, SK-VH36B-BN.
Features
Working pressure up to 6000 psig (413 bar)
Temperature up to 900 F (482 C)
Metal to metal seat
Materials of Construction
Component
1 Body
2 Bonnet Nut
3 Bonnet
4 Poppet
Valve Body Material
Stainless Steel
Material Grade/ASTM
SS316/A276 or A479
SS316/A276 or A479
TYPE630/A564
SS316/A276 or A479
How to order
: Select a complete ordering number. i.e., VL36A-D-4T-S.
D4T-S
D6M-S
F2N-S
F4N-S
SW4T-S
D6T-S
F4N-S
SW6T-S
SW8T-S
D8T-S
D12T-S
F6N-S
F8N-S
SW8T-S
Complete Ordering Number and Dimensions
1/4 in. DK-LOK
6 mm DK-LOK
1/8 in. Female NPT
1/4 in. Female NPT
1/4 in. tube socket weld
3/8 in. DK-LOK
1/4 in. Female NPT
3/8 in. Tube Socket Weld
1/2 in. Tube Socket Weld
1/2 in. DK-LOK
3/4 in. DK-LOK
3/8 in. Female NPT
1/2 in. Female NPT
1/2 in. Tube Socket Weld
4.0
6.4
11.1
0.156
0.250
0.437
61.0 (2.40)
50.8 (2.00)
46.0 (1.81)
71.9(2.83)
57.2 (2.25)
99.6 (3.92)
79.2(3.12)
79.5 (3.13)
37.3
(1.47)
47.0
(1.85)
62.0
(2.44)
0.30
0.64
2.20
7/8
1 1/4
1 1/2
VL36A-
VL36B-
VL36C-
9.9
(.39)
12.7
(.50)
15.7
(.62)
Complete
Ordering Number
End
Connection
Orifice
mm inch Cv
Dimensions
mm (in.)
L
H
H1 Hex
Pressure-Temperature Ratings
ASME Class
Material Group
Material Name
Temp.
F ( C)
-65 to 100
(-53 to 37)
200 (93)
300 (148)
400 (204)
500 (260)
600 (315)
700 (371)
800 (426)
900 (482)
2500
2.2
SS316
Working Pressure
psig (bar)
6000 (413)
5160 (355)
4660 (321)
4280 (294)
3980 (274)
3760 (259)
3600 (248)
3460 (238)
3280 (225)
Operation
Operation of this valve heavily depends on gravity assistance. Thus mounting
horizontally with bonnet nut upward to allow poppet to operate vertically.
Reverse flow closes the valve, keeping poppet in the orifice.
Forward flow opens the valve, lifting the poppet
Lift check valve is primarily for use in liquid systems. If a slight amount of leakage
can be tolerated it can be used with heavy gases.
Reverse flow Cv is limited to less than 0.1% of forward Cv.
Spare Kits for Field Assembly
Check Valves